Sunk on 22 April 1944 in the North Atlantic south-west of Ireland, in position 52.09N, 19.07W, by depth charges from the Canadian frigates HMCS Matane and HMCS Swansea. 51 dead (all hands lost). (FDS/NHB, April 1986).

Sunk 24 April, 1944 southwest of Ireland, in position 50.36N, 18.36W,
by depth charges from a Canadian Sunderland aircraft (Sqdn. 423/A). (Postwar assessment)Notes. This attack was in fact against U-672 inflicting severe damages.

Attacks on this boat and other events

01.20 hrs, Bay of Biscay, outbound: U-311 shot down the Halifax (misidentified as a Flying Fortress) after being strafed and depth charged. The crew of eight were all lost.

(Sources: Franks/Zimmerman)

19 Mar 1944Despite being hunted for hours by the escorts of the large tanker convoy CU 17, U-311 penetrated the defences and sank the large US steam tanker Seakay in the Atlantic west of Lands End, eluding the escorts afterwards. (Sources: Blair, vol 2, page 506)

3 recorded attacks on this boat.

Men lost from U-boats

Unlike many other U-boats, which during their service lost men due to accidents and various other causes, U-311 did not suffer any casualties (we know of) until the time of her loss.

U-boat Emblems

We have 1 emblem entry for this boat. See the emblem page for this boat or view emblems individually below.